Display screen or portion thereof including a graphical user interface



FIG. 1 is a front view of a first image in a display screen or portionthereof including a graphical user interface, showing the new design.

FIG. 2 is a front view thereof showing a second image thereof.

FIG. 3 is a front view thereof showing a third image thereof.

FIG. 4 is a front view of the first image in the sequence shown in FIGS.1-3, but shown with the broken line environment removed;

FIG. 5 is a front view of a second image thereof; and,

FIG. 6 is a front view of a third image thereof.

The appearance of the images sequentially transitions between the imagesshown in FIGS. 1-3 and 4-6. The process or period in which one imagetransitions to another forms no part of the claimed design.

The outermost broken lines illustrate a display screen or portionthereof and form no part of the claimed design. The remaining brokenlines, illustrating portions of the graphical user interface, form nopart of the claimed design.

CLAIM The ornamental design for a display screen or portion thereofincluding a graphical user interface, as shown and described.